Therefore, in this case the total cost of window and frame will be 43 + 42 = 85 cents per square foot. For curved sash in curved walls, the cost is about twice as much as that of straight work. =86. Cost of Door Frames and Doors.=—The following estimate represents the cost of an ordinary door frame. All molded work is put in the estimate at 1 cent per square inch of section per foot of length less 35-per-cent. discount, which is the same thing as ⁶⁵/₁₀₀ cent per square inch of section per foot. COST OF A 2' 8" × 6' 8" DOOR FRAME IN PLACE 17 linear feet of ⁵/₄" × 6" rabbeted jambs $ .83 36 linear feet of 1" × 5" casing 1.17 36 linear feet of 1" × 2" back band .47 Dadoing and smoothing jambs and casing, 1 hour, at 40 cents per hour .40 Nails .05 Setting up jambs and casing,, 3 hours at 40 cents per hour 1.20 ----- Total $4.12 The area of the door is 2 ft. 8 in. × 6 ft. 8 in. = 17.78 square feet. Therefore, the cost of the preceding door frame per square foot of door is $4.12 ÷ 17.78 = 23 cents. =87.= The following estimate gives the cost of a door of moderate price. The size of this door is 2 ft. 8 in. × 6 ft. 8 in. × ⁶/₄ in. It has four panels, is made of No. 1 pine, and is finished with solid ogee molding. COST OF DOOR IN PLACE Price of door $2.75 Setting door, putting on hinges and lock, 2 hours, at 40 cents per hour .80 1 pair of 4" × 4" japanned-steel butts .16 1 mortise lock, brass-face knobs and escutcheons .70 ----- Total $4.41 If the door is provided with stuck molding instead of solid molding, it will cost about 50 cents more. The area of the door is 2 ft. 8 in. × 6 ft. 8 in. = 17.78 square feet. The cost per square foot is therefore $4.41 ÷ 17.78 = 25 cents. The total cost of door and frame per square foot of door is therefore 25 + 23 = 48 cents. =88.= The door just described has no transom. A transom 2 ft. 8 in. × 16 in., complete, will cost about $1. The area of such a transom is 2 ft. 8 in. × 16 in. = 3⁵/₉ square feet. The cost per square foot is therefore $1 ÷ 3⁵/₉ = 28 cents.